haha, thats my overflow pipe.. I didn't want a box taking up realestate so I made a skimmer bar.
you can see pics that will explain it better in this post
http://www.canreef.com/ubb6/cgi-bin/...c;f=7;t=000059
for the most part they work as I expected. but on hind thought I would have glued the inside pieces if I could do it over again.
Steve